Although a filing for an extension of stay (EOS) generally must be submitted before the expiration of an individual's previously authorized period of stay, an immigration officer at USCIS does have complete discretion to approve a late extension filing under federal regulations, specifically under 8 C.F.R. § 214.1 if the reasons for the delay warrant the discretion.
USCIS provides processing time information for every service center, field office, and other offices processing petitions and applications for immigration benefits. Visit USCIS' website for links to their current processing time charts according to dates. However this chart (or any other USCIS case status information) might not be very useful if your case is falling outside normal processing times and premium processing is not available. So what are your options after you have referenced this chart, submitted online and phone case status requests, and waited patiently for far too long?
There are four options that I will share with you that may get your case processed faster and decided on: